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On the sign:
[Emblem of the city of Madrid]
EN ESTE PALACIO HABITADO POR LOS REYES DE CASTILLA, NACIÓ EN 1536 JUANA DE AUSTRIA QUE LO TRANSFORMÓ EN MONASTERIO EN 1559
Juana of Austria (1535-1573), princess of Portugal and sister of Philip II of Spain, was born in this house, which she later turned into a convent. Convent of of Las Descales Reales - the convent of the royal women who walk barefoot, this is because the nuns did not wear shoes.